Means for collectively actuating and controlling alternating-current motors.



J. L. ROUTKN. LEQYWEL'I' ACTUAUNG AND CONTRUL'LRNG ALTERNAUNG CURREN APPLICATION HLED 1AN.\?. 1914.

Mme FOR cm I MUTORS.

Patentekifiune 8, 1915 I rosnrn tours ROUTIN, or rams, FRANCE.

,MEANS FOR coLLncrrvnLY- ACTUATING AND coivrnoxlmue ALTERNATING-CUBRENT morons.

Specification of Letters Patent.

Patented June 8, 1915..

Application filed January 17, 1914. Serial No. 812,643.

To all 11372 cmt may concern:

Be it known that I, Josnrn LOUIS Roman, a citizen of the French Republic, residing at Paris, in France, have invented certain new 5 and useful Improvements in Means for Collectively Actuatiii and Controlling Alternating-Current l otors, of which the following is a specification.

This invention relates to improvements in 1.0 the apparatus described. in my Patent No.

1,090,568, granted March 17, 1914, on application Serial No. 737087, filed on December 16th, 1912, entitled Means for collectively actuating and controlling alternating our- 15 rent motors. and designed for. the purpose of transmitting equal rotations to several receiving shafts separated from one another. The means interred to in my said previous application comprise a polyphase electric 29 current generator, a plurality of asynchronous motors, switch mechanism and a rheo stat, each of the receiving shafts being operated by means of one of said asynchronous motors provided nith a rotor wound so as to connect the slip rings of the rotors and to connect the whole of said rotors to the rheostat which is of invariable resistance.

The rheostat may be connected to the circuits" of said rotors either permanently or only at so the time when the motors are to be started. The first method has the inconvenience of e constant loss of energy and the in the roar circuit.

l of the present invention is to inconveniences.

L con in principle in governing each of the receiver shafts by means of an asynchronous motor, the rotor of which is provided with a collector which is utilized in the usual Y inner and with slip rings connected d points of its winding, whereby pcrn'ianent connections may be establishedbetwecn' all the rotors, by means of connecting While remaining asynchronous ith spent, to the generator which feeds them, the motors have the same slip and are (10.. oently synchronous to one another.

The annexed drawing; diagrammatically itatcs the use of a double switch illustrates the invention, the number of re ceivers beinp. reduced to two.

Each receiver compri es a repulsion motor having certain features as follows: 1 and 2 are the brushes which rub on the commu 5 tator of the rotor 3 and which are connected in short circuit. 4 and 5 are two field coils which may be excited. either together or separately and which are arranged, so that the magnetic fields corresponding to each are equally inclined with respect to the line of the brushes 1, 2. Brushes take the current from three rings 6, '7, 8, connected to j three equidistant points of the coil of the rotor 3. The rings 6, 7, 8 of the several motors are connected by wires (3, 7, 8. The, coils l are connected in parallel, as also are the coils 5. The switches 9, l0 and ll, 1), allow of passing through. the coils t and 5, the current produced by a monophsse ,qeuorator 13 actuated by a dynamo 1+1. 'When the two switches are closed as shown in the diagram the iield magnets are simultaneously excited and the resultant field is pen pendicular to the line of thwbrushes and the motorcouple is m'l. To start the motors in one direction or the other it is suilicient to lower one of the levers c 10 or ll-lit. To .assure the permanent connection of the receivers the levers 9-40 and l.l-l2 must never be lowered simultaneously.

What I claim as my invention desire to secure by Letters lPatent of the United States is In combination plurality of elect ic is 8-5 pulsion motors, each having a rotor, raving a winding and a commutator connected thereto, two brushes on said commutator; a conductor whereby said brushes are short circuited upon themselves, a plurality of slip rings, conductors severally connecting said slip rings to equidistant parts of the winding on-said rotor, and a stator having two windings disposed to produce fields at equal angles in relation to said brushes, to gether with conductors whereby the slip rings of each motor are severally connected to the slip rings of the other motor or motors, a monophase electric current generator, and means for supplying current from said 

